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Old 06-12-2010, 12:04 AM   #3458 (permalink)
jyanof
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Quote:
Originally Posted by reissmachinist View Post
The growl, I mistook for the same as the irritating curtiss controller whine
heard under some conditions.
I'd concur that the noise of the hardware over current protection sounds like the Curtis whine. My controller would trip at 480 amps. Turning the trimmer pot for the hardware OC a bit fixed it right away.

Also, one reason your controller may be running hot is that your motor/gear ratio requires high motor amps. For comparison, I use an air cooled heatsink (I had pics up here at some point) and have obsrved a constant load of 200 motor amps causes a 12C rise in temp.

One thing to try, if you haven't already, is keeping the motor rpm's high which will in turn keep the motor amps low.
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